John fairchild



gum: gtatrs gaunt @ft'int JOHN FAIRCHILD, OF EAGLEVILLE, 01110.

, Letters Patent 1V0. 68,720, dated September 10, 1867.

IMPROVED CEMENT 001mm;

TO ALL WHOM IT MAY CONCERN=- Be it known that I, Jous Fsmcmnn, ofEagle-ville, inthe county of Ashtabula, and Stste of Ohio, have inventeds new and improved Cement Compound for roofing purposes; and I do herebydeclare that the following is 1 full, clelr, and exact description ofthe ingredients used, end the manner of compounding the some.

The ingredients used and their proportion to one another are, one partfine water-lime, one part fine silicious send, one part conl tar.Sulphur and sulphate of lime in the proportions hereinafter stated.

In forming this compound the water-lime and siliciou s send are firstmixed together, after which the coal ter, in a heated state, is added,end the whole thoroughly incorporated together. The-tenacity andflexibility oi the compound are increased by mixing sulphur with theheated coal tar, in the proportion of one pound of sulphur to twentygallons of tar.

Greater hardness is obtained by the addition of sulphate of lime in thesame proportion-ls shove mentioned for sulphur.

This composition, in a plastic state, may be spread properly on the roofby using: common cement-trowel. whet I claim as my invention, and desireto secure by Letters Patent, is The composition herein described,compounded in the manner and for the pnrposo-eet forth.

J GEN FAIRCHILD.

Witneael:

A. H. Howxnns, W. C. HOYKLLB.

